MB to KB Converter
Convert megabytes to kilobytes instantly. One megabyte equals exactly 1,000 kilobytes. Type in either box to convert both ways, then use the chart, worked examples and everyday sizes below.
How to convert megabytes to kilobytes
Worked example: convert 250 megabytes to kilobytes. Using kilobytes ← megabytes × 1,000, we get 250 × 1,000 = 250,000 KB. To check the result, convert back: 250,000 KB ÷ 1,000 = 250 MB.
Megabytes to kilobytes chart
| Megabytes (MB) | Kilobytes (KB) |
|---|---|
| 1 MB | 1,000 KB |
| 2 MB | 2,000 KB |
| 3 MB | 3,000 KB |
| 4 MB | 4,000 KB |
| 5 MB | 5,000 KB |
| 6 MB | 6,000 KB |
| 8 MB | 8,000 KB |
| 10 MB | 10,000 KB |
| 12 MB | 12,000 KB |
| 15 MB | 15,000 KB |
| 20 MB | 20,000 KB |
| 25 MB | 25,000 KB |
| 30 MB | 30,000 KB |
| 40 MB | 40,000 KB |
| 50 MB | 50,000 KB |
| 75 MB | 75,000 KB |
| 100 MB | 100,000 KB |
| 150 MB | 150,000 KB |
| 200 MB | 200,000 KB |
| 250 MB | 250,000 KB |
| 500 MB | 500,000 KB |
| 1,000 MB | 1,000,000 KB |
Kilobytes to megabytes (reverse)
| Kilobytes (KB) | Megabytes (MB) |
|---|---|
| 1 KB | 0.001 MB |
| 2 KB | 0.002 MB |
| 5 KB | 0.005 MB |
| 10 KB | 0.01 MB |
| 20 KB | 0.02 MB |
| 50 KB | 0.05 MB |
| 100 KB | 0.1 MB |
| 250 KB | 0.25 MB |
| 500 KB | 0.5 MB |
| 1,000 KB | 1 MB |
About the megabyte and the kilobyte
A megabyte is 1,000,000 bytes in decimal. A typical smartphone photo is a few megabytes and an MP3 song around 3 to 5 MB. In binary terms 1 MiB is 1,048,576 bytes.
A kilobyte is 1,000 bytes in the decimal (SI) system used by storage makers and macOS. Windows and some tools use 1,024 bytes, which is properly called a kibibyte (KiB).
One megabyte is 1,000 times the size of one kilobyte, so it takes fewer megabytes than kilobytes to express the same amount.
Everyday sizes in megabytes and kilobytes
| Everyday example (approximate) | In megabytes | In kilobytes |
|---|---|---|
| A short text message | 0.00014 MB | 0.14 KB |
| A plain-text email | 0.005 MB | 5 KB |
| A web page | 2 MB | 2,000 KB |
| A phone photo | 3 MB | 3,000 KB |
| A 3-minute MP3 song | 5 MB | 5,000 KB |
| A 2-hour HD movie | 3,000 MB | 3,000,000 KB |
Megabytes to kilobytes FAQ
How many kilobytes are in one megabyte?
One megabyte equals exactly 1,000 kilobytes. In the other direction, one kilobyte equals 0.001 megabytes.
How do I convert megabytes to kilobytes without a calculator?
convert 250 megabytes to kilobytes. Using kilobytes ← megabytes × 1,000, we get 250 × 1,000 = 250,000 KB. To check the result, convert back: 250,000 KB ÷ 1,000 = 250 MB. For a quick estimate, round the factor to 1,000. Then 250 MB is about 250,000 KB, compared with the exact 250,000 KB (an error of 0%). That is close enough for planning, but use the calculator above when the number matters.
What is a 3-minute MP3 song in kilobytes?
A 3-minute MP3 song is about 5 megabytes, which is 5,000 kilobytes. Treat that as an approximate everyday figure rather than an official measurement.
Are the megabytes and kilobytes the same in every country?
Decimal MB = 1,000,000 bytes; binary MiB = 1,048,576 bytes. Decimal KB = 1,000 bytes; binary KiB = 1,024 bytes. Windows often labels KiB as KB.